EP0576503B1 - Procede de dosage d'un catalyseur fluidise de polymerisation lors du remplissage d'un reacteur de polymerisation - Google Patents

Procede de dosage d'un catalyseur fluidise de polymerisation lors du remplissage d'un reacteur de polymerisation Download PDF

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Publication number
EP0576503B1
EP0576503B1 EP92906708A EP92906708A EP0576503B1 EP 0576503 B1 EP0576503 B1 EP 0576503B1 EP 92906708 A EP92906708 A EP 92906708A EP 92906708 A EP92906708 A EP 92906708A EP 0576503 B1 EP0576503 B1 EP 0576503B1
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EP
European Patent Office
Prior art keywords
piston
cylinder
intermediate pipe
catalyst
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92906708A
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German (de)
English (en)
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EP0576503A1 (fr
Inventor
Jukka Koskinen
Klaus Nyfors
Pauli Leskinen
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Borealis Polymers Oy
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Borealis Polymers Oy
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
    • B01J8/003—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor in a downward flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
    • B01J8/002—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor with a moving instrument
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
    • B01J8/0035—Periodical feeding or evacuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/06—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated

Definitions

  • the invention relates to a method for the dosage of a fluidized polymerization catalyst into a polymerization reactor.
  • a requirement of the dosage pump of a fluid substance is that its dosage accuracy is as great as possible simultaneously as it is retaining its reliability of operation.
  • a pump of the above-mentioned type is disclosed in FI patent specification 65127, wherein a double cylinder pump with valves installed in the inlet and outlet openings of the piston-swept space has been used for the synchronized feed of two substances. It has been thought that one of the pump chambers is feeding wax intended for the burnishing of cars.
  • the combining of the dosage accuracy with the reliability of operation becomes difficult.
  • the dosage accuracy suffers if the hard flowing substance slows down or prevents the cooperation of the valves of the inlet and outlet openings in the piston-swept space of the cylinder chamber.
  • the valves can also be clogged or they can become out of order due to the high pressure used in the tube system.
  • the drawback of the dosage pump according to the above-mentioned FI patent specification 65127 is, in fact, that the conventional valves of inlet and outlet openings do not operate faultlessly when hard flowing wax is used.
  • FI 68630 discloses a method and a device for adding continuously pulverous coordination catalyst into a pressurized reactor.
  • a mixture of the catalysator and a wax, such as a polyethene wax is pumped by means of an inert medium, such as heptane, into the polymerization reactor.
  • the dosage problem has thus been solved by using a medium decreasing the hard flowability.
  • the present invention concerns with the provision of a dosage method for a fluid substance having a great dosage accuracy and reliability of operation, particularly when dosing hard flowing substance.
  • the invention is, furthermore, concerned with the provision of a method for dosing of a coordination catalyst into an olefin polymerization reactor, particularly a pressurized reactor.
  • the dosage pump can be provided with a freely travelling and tightly between the inner mantle surface of the cylinder and the outer mantle surface of the piston arranged intermediate pipe having a transmission opening adjustable upon the inlet and outlet opening of the piston-swept space.
  • the opening and closing of the inlet and outlet openings in the piston-swept space of the cylinder is carried out by freely rotating the intermediate pipe mentioned so that its transmission opening overlaps either the inlet or the outlet opening, whereby the whole surface of the intermediate pipe always covers either the inlet opening on the outlet opening.
  • the invention is thus related to a new kind of dosage pump comprising a cylinder, a back and forth moving piston limiting the piston-swept space of the cylinder, whereby the piston-swept space is provided with openable inlet and outlet openings, and a freely travelling intermediate pipe arranged tightly between the cylinder and the piston having a transmission opening removable upon the inlet and outlet openings mentioned.
  • the dosage pump according to the method of the present invention can be any cylinder pump having inlet and outlet openings in its piston-swept space limited by the piston, Accordingly, both single- or double-acting cylinders and cylinders connected in series or in parallel can be used.
  • the piston can be e.g. a piston movable mechanically by means of a spindle or a piston movable by a hydraulic substance.
  • the inlet and outlet openings of the piston-swept space can, in principle, be located in any wall of the cylinder part limiting the piston-swept space.
  • the inlet and outlet openings are located in the mantle part of the cylinder and the transmission opening in the mantle of the intermediate pipe. It is preferable that the openings mentioned are essentially in the same, to the cylinder axis vertical plane whereby they meet when rotating the intermediate pipe around its axis.
  • the intermediate pipe As the intermediate pipe has been tightly arranged between the inner mantle surface of the cylinder and the outer mantle surface of the piston, it can, in principle, be moved in the direction of the axis of the cylinder and/or rotated in the direction of its circumference.
  • a condition for a rotational motion in the direction of the circumference of the cylinder is that the opposite surfaces of the cylinder, the piston and the intermediate pipe have the form of concentric straight circular cylinders.
  • the cylinder, piston and intermediate pipe are round and concentric and their openings are located substantially on the circumference encircling the axis of the cylinder.
  • the inlet and outlet openings are easily openable and closable by simply rotating the intermediate pipe around its axis.
  • the device steering the intermediate pipe is, according to one embodiment of the invention, arranged into contact with the operation-side or front end of the cylinder.
  • the steering device of the intermediate pipe is planned to turn the intermediate pipe around its axis in the above-described manner.
  • the intermediate pipe can be separated from the cylinder by slide sealing and a sealing liquid space.
  • the piston can be separated from the intermediate pipe by slide sealings and a sealing liquid space.
  • Both sealing liquid spaces can be furnished with aggregates going through the cylinder. If solid particles of the liquid to be fed enters from the piston-swept space into the sealing liquid spaces, they can be rinsed clean through the aggregates.
  • the circulation of the sealing liquid can hereby also be arranged to take place occasionally or continuously.
  • hydrocarbon wax of the catalyst can be used as the sealing liquid so that in the sealing liquid space the pressure is greater than in the piston-swept space of the cylinder.
  • the dosage pump can, moreover, be furnished with a heating mantle for the regulation of the viscosity of the substance to be pumped.
  • the size, shape and number of the inlet, outlet and transmission openings are optional.
  • at least the shape of the transmission opening is preferably oval in order to maximize the feed surface area and minimize the clogging risk.
  • the invention relates to a method for dosing a fluidized polymerization catalyst into a polymerization reactor.
  • the method is particularly suitable for dosing high-viscous substances.
  • the run of the method or its cycle is typically the following: in the beginning a solid polymerization catalyst is mixed with wax in a mixer to give a flowing catalyst-wax mixture, the flowing catalyst-wax mixture is fed along a flowing aggregate to the dosage pump, the inlet opening located in the piston-swept space of the cylinder of the dosage pump is opened-by moving the intermediate pipe arranged tightly between the cylinder and the piston so that the transmission opening in it moves upon the inlet opening. Then the flowing catalyst-wax mixture is sucked to the piston-swept space of the cylinder through the open inlet opening by means of the back motion of the piston until the piston-swept space limited by the cylinder and the piston corresponds to the amount of the substance to be dosed.
  • the outlet opening is opened by moving the intermediate pipe mentioned in order to move its transmission opening upon the outlet opening, whereby the inlet opening simultaneously becomes closed when it is covered by the whole intermediate pipe surface.
  • the intermediate pipe is preferably moved so that its transmission opening rotates the axis of the cylinder.
  • the intermediate pipe can advantageously be steered by a steering device arranged into contact with the operation-side end of the cylinder.
  • the method according to the invention for dosing a fluidized polymerization catalyst is preferably used in connection with the polymerization of olefins when dosing solid coordination catalyst into a polymerization reactor.
  • the dosage is preceded by a mixing stage, in which the catalyst is mixed with the wax, and a feeding stage, in which the mixed liquid catalyst-wax-mixture is fed to the dosage pump.
  • the method is particularly suitable for high-pressure polymerization of olefins since its dosage accuracy and reliability of operation are preserved in spite of the high pressure.
  • the above-mentioned wax is conducted in between the cylinder and the intermediate pipe and/or between the intermediate pipe and the piston.
  • the dosage pump and method according to the invention are suitable for the viscosity range of a fluidized polymerization catalyst varying from 0.1 to 500,000mPas.
  • the dosage capacity of the pump may vary between 0.001 and 8,0001/h/cylinder, the suction pressure between 0 and 350 bar, the feed pressure between 0 and 350 bar and the operating temperature between 0 and 700°C, whereby its dosage accuracy is of the size class 0.01%.
  • the dosage pump 1 according to the embodiment depicted in Fig. 1 comprises a cylinder 2 and a piston 4 moving back and forth inside it, which simultaneously limits together with the inner surfaces of the cylinder the piston-swept space 3 furnished with an openable inlet opening 5 leading thereto and an outlet opening 6.
  • the intermediate pipe 7 extends from the back end of the cylinder 2 in the direction of the axis at least to the point, in which the operation-side end of the piston 4 is located when the piston 4 is in its extreme 15 back position.
  • the cylinder 2, the piston 4 and the intermediate pipe 7 form a concentric circular cylinder system.
  • the intermediate pipe 7 has a transmission opening 8, which by rotation of the intermediate pipe 7 around its axis, moves upon the inlet opening 5 or the outlet opening 6 while the whole cylinder surface of the intermediate pipe 7 always covers one of the openings of the piston-swept space.
  • the intermediate pipe 7 is rotated around its axis by means of the steering device 9, which is arranged into contact with the operation-side or front end 10 of the cylinder 2.
  • the dosage pump 1 operates so that the inlet opening 5 in the piston-swept space 3 of the cylinder 2 is opened by rotating the intermediate pipe 7 arranged between the cylinder 2 and the piston 4 so that the transmission opening 8 of it moves upon the inlet opening 5, the whole surface of the intermediate pipe 7 covering the outlet opening 6.
  • the hard-flowing catalyst-wax mixture is pressed from the piston-swept space 3 through the outlet opening 6 by means of a forward motion of the piston 4 to the space, to which the flowing substance is intended to be dosed, namely the polymerization reactor. Finally, the outlet opening 6 is closed.
  • the above-described method can be used for the feeding of detached doses or it can be used as a cycle of automatic or semiautomatic pumping.
  • Fig. 2 depicts the use of the dosage pump 1 according to the invention for the dosing of catalyst 16 into the olefin polymerization reactor 17.
  • the equipment comprises the mixing vessel 18 of the catalyst 16 and the wax 19, which is furnished with dosing valves of the substances mentioned, a supply valve for nitrogen, a heating mantle 21, a mixer 22 and a back-flow valve 23.
  • the back-flow valve 23 of the mixing vessel 18 is connected through pipe 20 to the dosage pump 1 according to the invention, which preferably is a dosage pump 1 according to fig. 1.
  • the dosage pump 1 is connected through pipe 26 furnished with a valve and a flushing branch 25 to the polymerization reactor 17.
  • the feeding system of the solid catalyst of the olefin polymerization according to fig. 2 operates so that to the mixing vessel 18 filled with pure nitrogen is fed solid catalyst 16 and suspending wax 19, after which these components are mixed by means of the mixer 22 and the heating mantle 21 to a homogeneous suspension.
  • valve 23 When a homogeneous mixture of the catalyst 16 and the wax 19 is created, the valve 23 is opened and the mixture transfers through pipe 20 to the dosage pump 1, which in the above-described manner and with great dosage accuracy and reliability of operation feeds the mixture of the catalyst 16 and the wax 19 to the polymerization reactor. In this manner a better feed of solid catalyst to the polymerization reactor of olefins than before is achieved.
  • the following process description comprises the preparation of the catalyst wax and its dosage continuously to a polymerization reactor of pilot or industrial scale.
  • the process is described in fig. 3.
  • the catalyst feed equipment 27 according to fig. 3 comprises the feeders 28 of the catalyst wax, the feeders 29 of the catalyst, the mixing containers 30 of the catalyst and the catalyst wax, a piston pump 31, the feeders 32 of the cocatalyst and the donor, the feeder 33 of the reagents, into which leads the feeder 34 of the monomer or the medium, and finally the polymerization reactor 35.
  • polyalphaolefin the viscosity of which is 4 mm 2 /s (4cSt), and 4.0% by weight of pulverous polyethene wax.
  • the temperature is raised to 100°C, at which temperature the tactic polyethene dissolves into polyalphaolefin.
  • the mixture is agitated constantly.
  • nitrogen is led to the container 30 through its lower part, so that possible impurities may be stripped away from the mixture.
  • the treatment with nitrogen is continued for at least 2 hours.
  • the temperature of the mixture is decreased to 70°C, whereby its viscosity is 0.07-0.08 Pa ⁇ s (70-80cp).
  • the gases can be removed from the mixture by means of a vacuum treatment lasting about 1 hour. After this catalyst is added to the mixture by means of nitrogen pressure through the catalyst feeder 29 so that the content becomes 50g/1, if a pilot polymerization reactor is in question. In industrial scale the content of 150g/l can be used.
  • the vacuum and the nitrogen feed are still connected. After about one hour the vacuum is removed and the reactor is pressurized to a pressure of about 10 bars.
  • the mixture is mixed at a temperature of 70°C for 3 hours, after which the temperature is decreased gradually to about 20°C, whereby the viscosity of the catalyst wax is 4.5 Pa ⁇ s (4500cp).
  • the agitation is decreased so no gas bubbles will be created in the mixture.
  • a sample is taken from the catalyst wax to check the content.
  • the preparation of the catalyst wax can also be connected directly with activation process of the catalyst, whereby the ready catalyst is mixed into the catalyst wax.
  • the catalyst wax is then conducted by means of pressure along nitrided pipes (at least 12mm) into piston pipe 31, which is not provided with a valve.
  • the pump is one according to the method of the present invention and the length of stroke is adjusted so that the catalyst transfers suitably in regard to the process conditions. Under pilot conditions the feed amount is about 20ml and in industrial scale about 3400ml of catalyst wax per hour, when the above-mentioned concentrations are used. If the catalyst wax is prepared of prepolymerized catalyst, the amounts are 4 to 5 fold.
  • the donor, of which there is 5% by volume, and the cocatalyst, of which there is 10% by volume, are dosed through feeders 32 preferably by pumps of their own so that they are first connected to one and the same pipe and then to the feeder of the catalyst wax.
  • the donor and the cocatalyst can also be conducted to the reactor by the same pump as the catalyst, if there is a suction opening in the dosage pump separately for both substances.
  • the pipes are measured-so that the contact time between the donor and the cocatalyst is about 10 min. and the contact time between these and the catalyst is about 10 to 30 minutes.
  • the feed aggregate 33 is furnished with a pressure equalizer to prevent the pulsation. Furthermore, the feed aggregate 33 comprises a simple pipe mixer so that the contact of the reagents can be improved.
  • the cooled monomer or medium is conducted through the feeder 34 to the forward end of the double-layered feed aggregate 33. At the end of the feeder of the catalyst reagents there is a nozzle of 0.90mm, from which the monomer or medium picks up the catalyst.
  • the feed aggregate 33 of which there can be several in spare, is furnished with nitriding, removal and oxygen measuring aggregates. It can also be closed from the reactor by means of a ball valve without stopping the polymerization.
  • the catalyst reagents and the monomers are fed in the desired order into the polymerization reactor 35, in which the monomers are polymerized by the aid of catalyst reagents to the desired product.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

La pompe doseuse selon l'invention comprend un cylindre (2), un piston (4) effectuant des mouvements de va-et-vient et un orifice d'entrée (5) et un orifice de sortie (6) pouvant être ouverts et fermés dans l'espace (3) balayé par le piston. L'ouverture et la fermeture des orifices mentionnés sont effectuées par un tuyau intermédiaire (7) disposé de manière mobile et étanche entre le cylindre (2) et les jupes du piston (4). L'orifice de transmission (8) du tuyau intermédiaire (7) est transposé en déplaçant le tuyau intermédiaire (7) sur l'orifice d'entrée (5) et l'orifice de sortie (6), la surface totale du tuyau intermédiaire recouvrant toujours un des orifices d'entrée (5) ou de sortie (6) déjà décrits. La pompe doseuse peut être utilisée de préférence pour le dosage de matières difficilement coulantes, par exemple pour l'alimentation d'un réacteur de polymérisation d'oléfines en catalyseurs solides ou en cire.

Claims (6)

  1. Un procédé d'introduction d'un catalyseur de polymérisation fluidisé dans un réacteur de polymérisation, au moyen d'un malaxeur (18), d'un collecteur de fluides (20) et d'une pompe d'alimentation (1) comportant un cylindre (2), lequel cylindre (2) comprenant :
    - un volume balayé par le piston (3) contenant un piston se déplaçant en va-et-vient (4), et
    - un manchon intermédiaire mobile (7) muni d'un orifice de communication (8), le manchon (7) étant disposé ajusté entre le cylindre (2) et le piston (4) ;
    - un orifice d'entrée (5) ; et
    - un orifice de sortie (6),
    dans lequel procédé un catalyseur de polymérisation solide (16) est malaxé avec une cire (19) dans le malaxeur (18) pour donner un mélange catalyseur-cire fluide, le mélange catalyseur-cire fluide est introduit par un collecteur de fluide (20) dans la pompe d'alimentation (1), l'orifice d'entrée (5) est ouvert par déplacement du manchon (7) de telle sorte que l'orifice de communication (8) soit en regard de l'orifice d'entrée (5), le mélange catalyseur-cire fluide est aspiré dans le volume balayé par le piston (3) par l'intermédiaire de l'orifice d'entrée (5) grâce au mouvement vers l'arrière du piston (4), l'orifice d'entrée (5) est fermé et l'orifice de sortie (6) est ouvert par déplacement du manchon (7) de façon que son orifice de communication (8) soit en regard de l'orifice de sortie (6) mais pas de l'orifice d'entrée (5), et le mélange catalyseur-cire fluide est exprimé par l'orifice de sortie (6) grâce au mouvement vers l'avant du piston (4), caractérisé en ce que, pour l'étanchéité de la pompe d'alimentation (1), ladite cire (19) est amenée entre le cylindre (2) et le manchon intermédiaire (7) et/ou entre le manchon intermédiaire (7) et le piston (4).
  2. Un procédé selon la revendication 1, caractérisé en ce que ladite cire est un produit d'oligomérisation d'une α-oléfine ou d'un mélange de celle-ci avec une cire de polyéthylène.
  3. Un procédé selon la revendication 1 ou 2, caractérisé en ce que le manchon intermédiaire (7) est déplacé de façon que son orifice de communication (8) ou ses orifices de communication tournent autour de l'axe du cylindre (2) sur la même circonférence que celle où sont situés les orifices d'entrée (5) et de sortie (6) de la chemise du cylindre (2).
  4. Un procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le manchon intermédiaire (7) est commandé par un dispositif de commande (9) disposé au contact de l'extrémité du côté moteur (10) du cylindre.
  5. Un procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le dispositif de commande (9) du manchon intermédiaire (7) est constitué d'un dispositif faisant tourner le manchon intermédiaire librement autour de son axe.
  6. Un procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les surfaces en contact du piston (4) du cylindre (2) et du manchon intermédiaire (7) sont des surfaces de glissement les unes par rapport aux autres ou hydrostatiques.
EP92906708A 1991-03-21 1992-03-20 Procede de dosage d'un catalyseur fluidise de polymerisation lors du remplissage d'un reacteur de polymerisation Expired - Lifetime EP0576503B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI911388 1991-03-21
FI911388A FI94164C (fi) 1991-03-21 1991-03-21 Menetelmä juoksevaksi saatetun polymerointikatalyytin annostelemiseksi polymerointireaktoriin
PCT/FI1992/000080 WO1992016747A1 (fr) 1991-03-21 1992-03-20 Procede de dosage d'un catalyseur fluidise de polymerisation lors du remplissage d'un reacteur de polymerisation

Publications (2)

Publication Number Publication Date
EP0576503A1 EP0576503A1 (fr) 1994-01-05
EP0576503B1 true EP0576503B1 (fr) 1996-06-05

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EP92906708A Expired - Lifetime EP0576503B1 (fr) 1991-03-21 1992-03-20 Procede de dosage d'un catalyseur fluidise de polymerisation lors du remplissage d'un reacteur de polymerisation

Country Status (6)

Country Link
US (1) US5385992A (fr)
EP (1) EP0576503B1 (fr)
JP (1) JPH06507190A (fr)
DE (1) DE69211335T2 (fr)
FI (1) FI94164C (fr)
WO (1) WO1992016747A1 (fr)

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FI991015A0 (fi) 1999-05-04 1999-05-04 Borealis As Menetelmä alfa-olefiinipolymeerien valmistamiseksi
FI991461A0 (fi) * 1999-06-28 1999-06-28 Borealis As Menetelmä hiukkasmuodossa olevan aineksen syöttämiseksi
ES2309445T3 (es) 2004-12-17 2008-12-16 Borealis Technology Oy Proceso para la polimerizacion de olefinas en presencia de un catalizador de polimerizacion de las mismas.
US7615596B2 (en) 2005-09-30 2009-11-10 Chevron Phillips Chemical Company Lp Multiple component feed methods and systems
EP2054451B1 (fr) * 2006-08-25 2013-09-18 Basell Poliolefine Italia S.r.l. Préparation d'une pâte catalytique pour la polymérisation oléfinique
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CA2749835C (fr) 2011-08-23 2018-08-21 Nova Chemicals Corporation Approvisionnement de catalyseurs de phosphinimine tres actifs dans un reacteur en phase gazeuse
FR3008744A1 (fr) * 2013-07-22 2015-01-23 Eveon Sous-ensemble oscillo-rotatif et dispositif de pompage volumetrique oscillo-rotatif pour pompage volumetrique d'un fluide
FR3008745B1 (fr) * 2013-07-22 2015-07-31 Eveon Sous-ensemble oscillo-rotatif et dispositif pour multiplexage fluidique et pompage volumetrique co-integres d'un fluide
US10675404B2 (en) 2014-04-07 2020-06-09 Becton, Dickinson And Company Rotational metering pump for insulin patch
CA2942102C (fr) 2014-04-07 2021-08-10 Becton, Dickinson And Company Pompe de dosage rotative pour timbre d'insuline
US10967121B2 (en) 2014-04-07 2021-04-06 Becton, Dickinson And Company Rotational metering pump for insulin patch
EP3241611B1 (fr) 2016-05-02 2020-03-04 Borealis AG Procédé d'alimentation d'un catalyseur de polymérisation
CN109563189B (zh) * 2016-08-10 2021-06-18 埃克森美孚化学专利公司 向溶液聚合反应器供应固体催化剂的方法
WO2018031157A1 (fr) 2016-08-10 2018-02-15 Exxonmobil Chemical Patents Inc. Procédés d'alimentation en catalyseurs solides d'un réacteur de polymérisation en solution
US10544246B2 (en) 2016-08-10 2020-01-28 Exxonmobil Chemical Patents Inc. Methods for supplying solid catalysts to a solution polymerization reactor
WO2018081796A2 (fr) * 2016-10-31 2018-05-03 Bridgestone Corporation Système de distribution de catalyseur pour cuve de polymérisation
US11174852B2 (en) 2018-07-20 2021-11-16 Becton, Dickinson And Company Reciprocating pump
JP2023519338A (ja) * 2020-03-27 2023-05-10 フルード・メタリング・インコーポレイテッド 圧力除去経路を備えた流体ポンプ

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Publication number Publication date
JPH06507190A (ja) 1994-08-11
DE69211335D1 (de) 1996-07-11
DE69211335T2 (de) 1996-10-31
WO1992016747A1 (fr) 1992-10-01
FI94164C (fi) 1995-07-25
FI94164B (fi) 1995-04-13
US5385992A (en) 1995-01-31
FI911388A (fi) 1992-09-22
FI911388A0 (fi) 1991-03-21
EP0576503A1 (fr) 1994-01-05

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